Hair curler having a high heat storage core telescopically mounted therein

ABSTRACT

Hair curler including a cylindrical wall made of plastic material and a guide tube provided with stop means adjacent each end thereof and mounted within such cylindrical wall so as to form an air space between the cylindrical wall and the guide tube. A central core having substantially the same length as the curler itself and made of a material having a large specific heat is adapted for axial displacement within the guide tube between a first position in which it is completely inserted into the curler and a second position in which one end of the core is projecting from the curler. The core has means cooperating with the above end stops for stopping the core at the above mentioned first and second positions. Pressure means are associated with the core and the guide tube for providing sufficient friction against displacement of the core with respect to the tube.

United States Patent [72] Inventor Richard Djenner Holte, Denmark [21]Appl. No. 817,006 [22] Filed Aprt 17, 1969 [45] Patented May 25, 1971[73] Assignee Olaf Bendik Elmer Copenhagen, Denmark [32] Priority Apr.19, 1968 [33] Denmark [31] 1740/68 [54] HAIR CURLER HAVING A HIGH HEATSTORAGE CORE TELESCOPICALLY MOUNTED THEREIN 4 Claims, 2 Drawing Figs.[52] 11.8. CI 219/222, 132/33, 132/117 [51] Int. Cl A45d 2/24 [50] Fieldof Search 219/222- 226, 242; 132/33, 38, 39,117 [56] References CitedUNITED STATES PATENTS 1,040,167 10/1912 DeMond 132/117 PrimaryExaminer-R. F. Staubly Attorney-Raymond A. Robic ABSTRACT: Hair curlerincluding a cylindrical wall made of plastic material and a guide tubeprovided with stop means adjacent each end thereof and mounted withinsuch cylindrical wall so as to form an air space between the cylindricalwall and the guide tube. A central core having substantially the samelength as the curler itself and made of a material having a largespecific heat is adapted for axial displacement within the guide tubebetween a first position in which it is completely inserted into thecurler and a second position in which one end of the core is projectingfrom the curler. The core has means cooperating with the above end stopsfor stopping the core at the above mentioned first and second positions.Pressure means are associated with the core and the guide tube forproviding sufficient friction against displacement of the core' withrespect to the tube.

PATENTED was I971 3581. 056

INVENTOR Richard DJENNER ATTORNEY The core is heated up to severalhundred degrees and must therefore be provided'with an isolated fingerknob, so that the operator will not burn herself. It takes a lot of timeand work to remove the cores from a large number of curlers, heat themand replace them in the curlers.

The object of the invention is to create a novel hair curler which isconsiderably easier to use so that both time and work is saved.

This is according to the invention obtained by the fact that the core isadapted for axial displacement between a position, in which it iscompletely'inserted in the curler, and another position, in which oneend of the core is projecting from the curler.

- When the core is projecting from one end of the curler, the curler maybe placed in a vertical position on a hot plate, a flatiron or the like,whereby the core is heated to the desired temperature. Thus, the curlerwall which is ordinarily made of plastic will have such distance fromthe heat source that it cannot be damaged. After the heating of thecore, the operator grasps thecurler wall and shakes'the core axiallyinto the inserted position. These operations can be carried out muchquicker and easier than a removal of the cores from the curlers withsubsequent heating and reinsertion. The insulated finger knobs On thecores can also be dispensed with.

According to the invention, the projectable end of the core may have anendportion with increased thickness, whereby the heat transmission fromthe hot plate to the core is improved, so that the heating time isreduced.

A practical embodiment of the invention is characterized in that thecore is slidable in a guide tube being provided with two end stopscorresponding to the inserted and projecting position of the core.Thereby, the two end positions of the core are determined, and the coreis centralized in the curler.

In order to prevent the core from being pushed out from the curler atthe wrong moment, whereby the user could burn her fingers, the structuremay be such that a radial bore in the core contains a spring loaded partbeing pressed by the spring means against. the inner side of the guidetube. Thereby, a suitable friction against the displacement of the corein the curler may be obtained. Thus, it is only possible to push thecore into and out of the curler by shaking the curler strongly, almostas by operating a clinical thermometer.

According to the invention the core may be axially prolonged by acentral spindle projecting from one end face of the core and beingslidably guided by suitable bearing means in the interior of the curler.Thereby, it is possible to slide the core completely out of the curler,so that the whole of the core 7 may be heated quickly in a suitablepocket in a heating apwhich one end of the core is projecting from thecomb.

The invention will now be disclosed with reference to an embodiment of ahair curler according to the invention, and to the accompanying drawingsin which:

FIG. I shows the hair curler in a broken longitudinal section, and

FIG. 2 the same, seen from the outside with a projecting core.

The hair curler has a cylindrical curler wall I of plastics. At the endsof the curler are transverse walls 2 of insulating material having holesfor receiving a guide tube 5, in which a core 4 of solid metal isaxially slidable. The guide tube 5 has an axial slot 6 in which a pin 7screwed onto the core 4 is slidable. The slot 6 forms an end stop forthe core 4 in the inserted position of the core as shown in FIG. I, andin the projecting position of the core as shown in FIG. 2. In a radicalbore in the core 4 is received a pressure spring urging a ball 8 outagainst the inner side of the guide tube 5, whereby a sufficientfriction against the displacement of the core 4 is obtained, so that thecore is not pushed out from the curler at the wrong moment.

The outer side of the guide tube 5 is chromium plated, so that the heatradiation is kept as low as possible, whereby an exaggerated steamgeneration in the hair is avoided. Between the guide tube 5 and thecurler wall I is left an air space 9 insulating the hot core 4 from thecurler wall I.

The curler wall 1' has a number of cutouts 3 through which heatradiation for drying the hair can pass.

When the core 4 is projecting from the guide tube as shown in FIG. 2,the thickened end thereof is placed on a hot plate, a flatiron turnedupside down, 'or the like, whereby the core 4 may be heated up toseveral hundred degrees C.). Thereafter the core 4 is shaken into itsinserted position shown in FIG. 1.

The core 4 may also consist of a tube containing a liquid having a largespecific heat.

I claim:

1. Hair curler comprising:

a. a cylindrical curler wall made of plastic material;

b. a guide tube provided with end stops adjacent each end thereof. andmounted within said wall so as to form an air space between said walland said guide tube;

. a central core having substantially the same length as the curleritself and made of a material having a large specific heat, said corebeing adapted for axial displacement within said guide tube between afirst position in which it is completely inserted into the curler and asecond position in which one end of the core is projecting from thecurler, said core being provided with means cooperating with said endstops for stopping the core at said first and second positionscorresponding to the inserted and projecting positions of the core; and

d. pressure means associated with said core and said guide tube forproviding sufficient friction against displacement of said core intosaid guide tube.

2. Hair curler as claimed in claim 1, characterized in that theprojectable end of the core has an end portion with increased thickness.

3. Hair curler as claimed in claim 1, characterized in that saidpressure means includes a spring loaded part located in a radial bore ofsaid core and urged against the inner side of the guide tube.

4. Hair curler as claimed in claim 1, characterized in that the core isaxially prolonged by a central spindle projecting from one end face ofthe core and being slidably guided by suitable bearing means in theinterior of the curler.

1. Hair curler comprising: a. a cylindrical curler wall made of plasticmaterial; b. a guide tube provided with end stops adjacent each endthereof, and mounted within said wall so as to form an air space betweensaid wall and said guide tube; c. a central core having substantiallythe same length as the curler itself and made of a material having alarge specific heat, said core being adapted for axial displacementwithin said guide tube between a first position in which it iscompletely inserted into the curler and a second position in which oneend of the core is projecting from the curler, said core being providedwith means cooperating with said end stops for stopping the core at saidfirst and second positions corresponding to the inserted and projectingpositions of the core; and d. pressure means associated witH said coreand said guide tube for providing sufficient friction againstdisplacement of said core into said guide tube.
 2. Hair curler asclaimed in claim 1, characterized in that the projectable end of thecore has an end portion with increased thickness.
 3. Hair curler asclaimed in claim 1, characterized in that said pressure means includes aspring loaded part located in a radial bore of said core and urgedagainst the inner side of the guide tube.
 4. Hair curler as claimed inclaim 1, characterized in that the core is axially prolonged by acentral spindle projecting from one end face of the core and beingslidably guided by suitable bearing means in the interior of the curler.